hodor5

hodor5.go

// DefaultChunkSize is the default amount of data read from an io.Reader
const DefaultChunkSize = 1024 * 16

// Process starts to stream data
func Process(r io.Reader) (io.Reader, error) {
	var buf, rbuf, result bytes.Buffer

	for {
		_, err := io.CopyN(&buf, r, DefaultChunkSize)
		if err != nil && err != io.EOF {
			return nil, err
		}

		if rerr := Replace(buf.Bytes(), []byte("hodor"), []byte("hold the door"), -1, &rbuf); rerr != nil {
			return nil, rerr
		}

		buf.Reset()

		if _, werr := result.Write(rbuf.Bytes()); werr != nil {
			return nil, werr
		}

		if err == io.EOF {
			return &result, nil
		}
	}
}